com.google.android.exoplayer2.source.dash.manifest.AdaptationSet Java Examples

@Override
protected List<Segment> getSegments(
    DataSource dataSource, DashManifest manifest, boolean allowIncompleteList)
    throws InterruptedException, IOException {
  ArrayList<Segment> segments = new ArrayList<>();
  for (int i = 0; i < manifest.getPeriodCount(); i++) {
    Period period = manifest.getPeriod(i);
    long periodStartUs = C.msToUs(period.startMs);
    long periodDurationUs = manifest.getPeriodDurationUs(i);
    List<AdaptationSet> adaptationSets = period.adaptationSets;
    for (int j = 0; j < adaptationSets.size(); j++) {
      addSegmentsForAdaptationSet(
          dataSource,
          adaptationSets.get(j),
          periodStartUs,
          periodDurationUs,
          allowIncompleteList,
          segments);
    }
  }
  return segments;
}
 

@Override
public TrackGroupArray getTrackGroups(int periodIndex) {
  Assertions.checkNotNull(manifest);
  List<AdaptationSet> adaptationSets = manifest.getPeriod(periodIndex).adaptationSets;
  TrackGroup[] trackGroups = new TrackGroup[adaptationSets.size()];
  for (int i = 0; i < trackGroups.length; i++) {
    List<Representation> representations = adaptationSets.get(i).representations;
    Format[] formats = new Format[representations.size()];
    int representationsCount = representations.size();
    for (int j = 0; j < representationsCount; j++) {
      formats[j] = representations.get(j).format;
    }
    trackGroups[i] = new TrackGroup(formats);
  }
  return new TrackGroupArray(trackGroups);
}
 

/**
 * Iterates through list of primary track groups and identifies embedded tracks.
 * <p>
 * @param primaryGroupCount The number of primary track groups.
 * @param adaptationSets The list of {@link AdaptationSet} of the current DASH period.
 * @param groupedAdaptationSetIndices The indices of {@link AdaptationSet} that belongs to
 *     the same primary group, grouped in primary track groups order.
 * @param primaryGroupHasEventMessageTrackFlags An output array containing boolean flag, each
 *     indicates whether the corresponding primary track group contains an embedded event message
 *     track.
 * @param primaryGroupHasCea608TrackFlags An output array containing boolean flag, each
 *     indicates whether the corresponding primary track group contains an embedded Cea608 track.
 * @return Total number of embedded tracks.
 */
private static int identifyEmbeddedTracks(int primaryGroupCount,
    List<AdaptationSet> adaptationSets, int[][] groupedAdaptationSetIndices,
    boolean[] primaryGroupHasEventMessageTrackFlags, boolean[] primaryGroupHasCea608TrackFlags) {
  int numEmbeddedTrack = 0;
  for (int i = 0; i < primaryGroupCount; i++) {
    if (hasEventMessageTrack(adaptationSets, groupedAdaptationSetIndices[i])) {
      primaryGroupHasEventMessageTrackFlags[i] = true;
      numEmbeddedTrack++;
    }
    if (hasCea608Track(adaptationSets, groupedAdaptationSetIndices[i])) {
      primaryGroupHasCea608TrackFlags[i] = true;
      numEmbeddedTrack++;
    }
  }
  return numEmbeddedTrack;
}
 

@Override
protected List<Segment> getSegments(
    DataSource dataSource, DashManifest manifest, boolean allowIncompleteList)
    throws InterruptedException, IOException {
  ArrayList<Segment> segments = new ArrayList<>();
  for (int i = 0; i < manifest.getPeriodCount(); i++) {
    Period period = manifest.getPeriod(i);
    long periodStartUs = C.msToUs(period.startMs);
    long periodDurationUs = manifest.getPeriodDurationUs(i);
    List<AdaptationSet> adaptationSets = period.adaptationSets;
    for (int j = 0; j < adaptationSets.size(); j++) {
      addSegmentsForAdaptationSet(
          dataSource,
          adaptationSets.get(j),
          periodStartUs,
          periodDurationUs,
          allowIncompleteList,
          segments);
    }
  }
  return segments;
}
 

private static Pair<TrackGroupArray, TrackGroupInfo[]> buildTrackGroups(
    List<AdaptationSet> adaptationSets, List<EventStream> eventStreams) {
  int[][] groupedAdaptationSetIndices = getGroupedAdaptationSetIndices(adaptationSets);

  int primaryGroupCount = groupedAdaptationSetIndices.length;
  boolean[] primaryGroupHasEventMessageTrackFlags = new boolean[primaryGroupCount];
  boolean[] primaryGroupHasCea608TrackFlags = new boolean[primaryGroupCount];
  int totalEmbeddedTrackGroupCount = identifyEmbeddedTracks(primaryGroupCount, adaptationSets,
      groupedAdaptationSetIndices, primaryGroupHasEventMessageTrackFlags,
      primaryGroupHasCea608TrackFlags);

  int totalGroupCount = primaryGroupCount + totalEmbeddedTrackGroupCount + eventStreams.size();
  TrackGroup[] trackGroups = new TrackGroup[totalGroupCount];
  TrackGroupInfo[] trackGroupInfos = new TrackGroupInfo[totalGroupCount];

  int trackGroupCount = buildPrimaryAndEmbeddedTrackGroupInfos(adaptationSets,
      groupedAdaptationSetIndices, primaryGroupCount, primaryGroupHasEventMessageTrackFlags,
      primaryGroupHasCea608TrackFlags, trackGroups, trackGroupInfos);

  buildManifestEventTrackGroupInfos(eventStreams, trackGroups, trackGroupInfos, trackGroupCount);

  return Pair.create(new TrackGroupArray(trackGroups), trackGroupInfos);
}
 

@Override
public TrackGroupArray getTrackGroups(int periodIndex) {
  Assertions.checkNotNull(manifest);
  List<AdaptationSet> adaptationSets = manifest.getPeriod(periodIndex).adaptationSets;
  TrackGroup[] trackGroups = new TrackGroup[adaptationSets.size()];
  for (int i = 0; i < trackGroups.length; i++) {
    List<Representation> representations = adaptationSets.get(i).representations;
    Format[] formats = new Format[representations.size()];
    int representationsCount = representations.size();
    for (int j = 0; j < representationsCount; j++) {
      formats[j] = representations.get(j).format;
    }
    trackGroups[i] = new TrackGroup(formats);
  }
  return new TrackGroupArray(trackGroups);
}
 

@Override
protected List<Segment> getSegments(
    DataSource dataSource, DashManifest manifest, boolean allowIncompleteList)
    throws InterruptedException, IOException {
  ArrayList<Segment> segments = new ArrayList<>();
  for (int i = 0; i < manifest.getPeriodCount(); i++) {
    Period period = manifest.getPeriod(i);
    long periodStartUs = C.msToUs(period.startMs);
    long periodDurationUs = manifest.getPeriodDurationUs(i);
    List<AdaptationSet> adaptationSets = period.adaptationSets;
    for (int j = 0; j < adaptationSets.size(); j++) {
      addSegmentsForAdaptationSet(
          dataSource,
          adaptationSets.get(j),
          periodStartUs,
          periodDurationUs,
          allowIncompleteList,
          segments);
    }
  }
  return segments;
}
 

@Override
protected List<Segment> getSegments(
    DataSource dataSource, DashManifest manifest, boolean allowIncompleteList)
    throws InterruptedException, IOException {
  ArrayList<Segment> segments = new ArrayList<>();
  for (int i = 0; i < manifest.getPeriodCount(); i++) {
    Period period = manifest.getPeriod(i);
    long periodStartUs = C.msToUs(period.startMs);
    long periodDurationUs = manifest.getPeriodDurationUs(i);
    List<AdaptationSet> adaptationSets = period.adaptationSets;
    for (int j = 0; j < adaptationSets.size(); j++) {
      addSegmentsForAdaptationSet(
          dataSource,
          adaptationSets.get(j),
          periodStartUs,
          periodDurationUs,
          allowIncompleteList,
          segments);
    }
  }
  return segments;
}
 

/**
 * Iterates through list of primary track groups and identifies embedded tracks.
 *
 * @param primaryGroupCount The number of primary track groups.
 * @param adaptationSets The list of {@link AdaptationSet} of the current DASH period.
 * @param groupedAdaptationSetIndices The indices of {@link AdaptationSet} that belongs to the
 *     same primary group, grouped in primary track groups order.
 * @param primaryGroupHasEventMessageTrackFlags An output array to be filled with flags indicating
 *     whether each of the primary track groups contains an embedded event message track.
 * @param primaryGroupCea608TrackFormats An output array to be filled with track formats for
 *     CEA-608 tracks embedded in each of the primary track groups.
 * @return Total number of embedded track groups.
 */
private static int identifyEmbeddedTracks(
    int primaryGroupCount,
    List<AdaptationSet> adaptationSets,
    int[][] groupedAdaptationSetIndices,
    boolean[] primaryGroupHasEventMessageTrackFlags,
    Format[][] primaryGroupCea608TrackFormats) {
  int numEmbeddedTrackGroups = 0;
  for (int i = 0; i < primaryGroupCount; i++) {
    if (hasEventMessageTrack(adaptationSets, groupedAdaptationSetIndices[i])) {
      primaryGroupHasEventMessageTrackFlags[i] = true;
      numEmbeddedTrackGroups++;
    }
    primaryGroupCea608TrackFormats[i] =
        getCea608TrackFormats(adaptationSets, groupedAdaptationSetIndices[i]);
    if (primaryGroupCea608TrackFormats[i].length != 0) {
      numEmbeddedTrackGroups++;
    }
  }
  return numEmbeddedTrackGroups;
}
 

private ChunkSampleStream<DashChunkSource> buildSampleStream(int adaptationSetIndex,
    TrackSelection selection, long positionUs) {
  AdaptationSet adaptationSet = adaptationSets.get(adaptationSetIndex);
  int embeddedTrackCount = 0;
  int[] embeddedTrackTypes = new int[2];
  boolean enableEventMessageTrack = hasEventMessageTrack(adaptationSet);
  if (enableEventMessageTrack) {
    embeddedTrackTypes[embeddedTrackCount++] = C.TRACK_TYPE_METADATA;
  }
  boolean enableCea608Track = hasCea608Track(adaptationSet);
  if (enableCea608Track) {
    embeddedTrackTypes[embeddedTrackCount++] = C.TRACK_TYPE_TEXT;
  }
  if (embeddedTrackCount < embeddedTrackTypes.length) {
    embeddedTrackTypes = Arrays.copyOf(embeddedTrackTypes, embeddedTrackCount);
  }
  DashChunkSource chunkSource = chunkSourceFactory.createDashChunkSource(
      manifestLoaderErrorThrower, manifest, periodIndex, adaptationSetIndex, selection,
      elapsedRealtimeOffset, enableEventMessageTrack, enableCea608Track);
  ChunkSampleStream<DashChunkSource> stream = new ChunkSampleStream<>(adaptationSet.type,
      embeddedTrackTypes, chunkSource, this, allocator, positionUs, minLoadableRetryCount,
      eventDispatcher);
  return stream;
}
 

private static Pair<TrackGroupArray, TrackGroupInfo[]> buildTrackGroups(
    List<AdaptationSet> adaptationSets, List<EventStream> eventStreams) {
  int[][] groupedAdaptationSetIndices = getGroupedAdaptationSetIndices(adaptationSets);

  int primaryGroupCount = groupedAdaptationSetIndices.length;
  boolean[] primaryGroupHasEventMessageTrackFlags = new boolean[primaryGroupCount];
  boolean[] primaryGroupHasCea608TrackFlags = new boolean[primaryGroupCount];
  int totalEmbeddedTrackGroupCount = identifyEmbeddedTracks(primaryGroupCount, adaptationSets,
      groupedAdaptationSetIndices, primaryGroupHasEventMessageTrackFlags,
      primaryGroupHasCea608TrackFlags);

  int totalGroupCount = primaryGroupCount + totalEmbeddedTrackGroupCount + eventStreams.size();
  TrackGroup[] trackGroups = new TrackGroup[totalGroupCount];
  TrackGroupInfo[] trackGroupInfos = new TrackGroupInfo[totalGroupCount];

  int trackGroupCount = buildPrimaryAndEmbeddedTrackGroupInfos(adaptationSets,
      groupedAdaptationSetIndices, primaryGroupCount, primaryGroupHasEventMessageTrackFlags,
      primaryGroupHasCea608TrackFlags, trackGroups, trackGroupInfos);

  buildManifestEventTrackGroupInfos(eventStreams, trackGroups, trackGroupInfos, trackGroupCount);

  return Pair.create(new TrackGroupArray(trackGroups), trackGroupInfos);
}
 

/**
 * Iterates through list of primary track groups and identifies embedded tracks.
 *
 * @param primaryGroupCount The number of primary track groups.
 * @param adaptationSets The list of {@link AdaptationSet} of the current DASH period.
 * @param groupedAdaptationSetIndices The indices of {@link AdaptationSet} that belongs to the
 *     same primary group, grouped in primary track groups order.
 * @param primaryGroupHasEventMessageTrackFlags An output array to be filled with flags indicating
 *     whether each of the primary track groups contains an embedded event message track.
 * @param primaryGroupCea608TrackFormats An output array to be filled with track formats for
 *     CEA-608 tracks embedded in each of the primary track groups.
 * @return Total number of embedded track groups.
 */
private static int identifyEmbeddedTracks(
    int primaryGroupCount,
    List<AdaptationSet> adaptationSets,
    int[][] groupedAdaptationSetIndices,
    boolean[] primaryGroupHasEventMessageTrackFlags,
    Format[][] primaryGroupCea608TrackFormats) {
  int numEmbeddedTrackGroups = 0;
  for (int i = 0; i < primaryGroupCount; i++) {
    if (hasEventMessageTrack(adaptationSets, groupedAdaptationSetIndices[i])) {
      primaryGroupHasEventMessageTrackFlags[i] = true;
      numEmbeddedTrackGroups++;
    }
    primaryGroupCea608TrackFormats[i] =
        getCea608TrackFormats(adaptationSets, groupedAdaptationSetIndices[i]);
    if (primaryGroupCea608TrackFormats[i].length != 0) {
      numEmbeddedTrackGroups++;
    }
  }
  return numEmbeddedTrackGroups;
}
 

/**
 * @param manifestLoaderErrorThrower Throws errors affecting loading of manifests.
 * @param manifest The initial manifest.
 * @param periodIndex The index of the period in the manifest.
 * @param adaptationSetIndex The index of the adaptation set in the period.
 * @param trackSelection The track selection.
 * @param dataSource A {@link DataSource} suitable for loading the media data.
 * @param elapsedRealtimeOffsetMs If known, an estimate of the instantaneous difference between
 *     server-side unix time and {@link SystemClock#elapsedRealtime()} in milliseconds, specified
 *     as the server's unix time minus the local elapsed time. If unknown, set to 0.
 * @param maxSegmentsPerLoad The maximum number of segments to combine into a single request.
 *     Note that segments will only be combined if their {@link Uri}s are the same and if their
 *     data ranges are adjacent.
 * @param enableEventMessageTrack Whether the chunks generated by the source may output an event
 *     message track.
 * @param enableEventMessageTrack Whether the chunks generated by the source may output a CEA-608
 *     track.
 */
public DefaultDashChunkSource(LoaderErrorThrower manifestLoaderErrorThrower,
    DashManifest manifest, int periodIndex, int adaptationSetIndex, TrackSelection trackSelection,
    DataSource dataSource, long elapsedRealtimeOffsetMs, int maxSegmentsPerLoad,
    boolean enableEventMessageTrack, boolean enableCea608Track) {
  this.manifestLoaderErrorThrower = manifestLoaderErrorThrower;
  this.manifest = manifest;
  this.adaptationSetIndex = adaptationSetIndex;
  this.trackSelection = trackSelection;
  this.dataSource = dataSource;
  this.periodIndex = periodIndex;
  this.elapsedRealtimeOffsetMs = elapsedRealtimeOffsetMs;
  this.maxSegmentsPerLoad = maxSegmentsPerLoad;

  long periodDurationUs = manifest.getPeriodDurationUs(periodIndex);
  AdaptationSet adaptationSet = getAdaptationSet();
  List<Representation> representations = adaptationSet.representations;
  representationHolders = new RepresentationHolder[trackSelection.length()];
  for (int i = 0; i < representationHolders.length; i++) {
    Representation representation = representations.get(trackSelection.getIndexInTrackGroup(i));
    representationHolders[i] = new RepresentationHolder(periodDurationUs, representation,
        enableEventMessageTrack, enableCea608Track, adaptationSet.type);
  }
}
 

/**
 * Iterates through list of primary track groups and identifies embedded tracks.
 *
 * @param primaryGroupCount The number of primary track groups.
 * @param adaptationSets The list of {@link AdaptationSet} of the current DASH period.
 * @param groupedAdaptationSetIndices The indices of {@link AdaptationSet} that belongs to the
 *     same primary group, grouped in primary track groups order.
 * @param primaryGroupHasEventMessageTrackFlags An output array to be filled with flags indicating
 *     whether each of the primary track groups contains an embedded event message track.
 * @param primaryGroupCea608TrackFormats An output array to be filled with track formats for
 *     CEA-608 tracks embedded in each of the primary track groups.
 * @return Total number of embedded track groups.
 */
private static int identifyEmbeddedTracks(
    int primaryGroupCount,
    List<AdaptationSet> adaptationSets,
    int[][] groupedAdaptationSetIndices,
    boolean[] primaryGroupHasEventMessageTrackFlags,
    Format[][] primaryGroupCea608TrackFormats) {
  int numEmbeddedTrackGroups = 0;
  for (int i = 0; i < primaryGroupCount; i++) {
    if (hasEventMessageTrack(adaptationSets, groupedAdaptationSetIndices[i])) {
      primaryGroupHasEventMessageTrackFlags[i] = true;
      numEmbeddedTrackGroups++;
    }
    primaryGroupCea608TrackFormats[i] =
        getCea608TrackFormats(adaptationSets, groupedAdaptationSetIndices[i]);
    if (primaryGroupCea608TrackFormats[i].length != 0) {
      numEmbeddedTrackGroups++;
    }
  }
  return numEmbeddedTrackGroups;
}
 

/**
 * Iterates through list of primary track groups and identifies embedded tracks.
 * <p>
 * @param primaryGroupCount The number of primary track groups.
 * @param adaptationSets The list of {@link AdaptationSet} of the current DASH period.
 * @param groupedAdaptationSetIndices The indices of {@link AdaptationSet} that belongs to
 *     the same primary group, grouped in primary track groups order.
 * @param primaryGroupHasEventMessageTrackFlags An output array containing boolean flag, each
 *     indicates whether the corresponding primary track group contains an embedded event message
 *     track.
 * @param primaryGroupHasCea608TrackFlags An output array containing boolean flag, each
 *     indicates whether the corresponding primary track group contains an embedded Cea608 track.
 * @return Total number of embedded tracks.
 */
private static int identifyEmbeddedTracks(int primaryGroupCount,
    List<AdaptationSet> adaptationSets, int[][] groupedAdaptationSetIndices,
    boolean[] primaryGroupHasEventMessageTrackFlags, boolean[] primaryGroupHasCea608TrackFlags) {
  int numEmbeddedTrack = 0;
  for (int i = 0; i < primaryGroupCount; i++) {
    if (hasEventMessageTrack(adaptationSets, groupedAdaptationSetIndices[i])) {
      primaryGroupHasEventMessageTrackFlags[i] = true;
      numEmbeddedTrack++;
    }
    if (hasCea608Track(adaptationSets, groupedAdaptationSetIndices[i])) {
      primaryGroupHasCea608TrackFlags[i] = true;
      numEmbeddedTrack++;
    }
  }
  return numEmbeddedTrack;
}
 

@Override
protected List<Segment> getSegments(
    DataSource dataSource, DashManifest manifest, boolean allowIncompleteList)
    throws InterruptedException, IOException {
  ArrayList<Segment> segments = new ArrayList<>();
  for (int i = 0; i < manifest.getPeriodCount(); i++) {
    Period period = manifest.getPeriod(i);
    long periodStartUs = C.msToUs(period.startMs);
    long periodDurationUs = manifest.getPeriodDurationUs(i);
    List<AdaptationSet> adaptationSets = period.adaptationSets;
    for (int j = 0; j < adaptationSets.size(); j++) {
      addSegmentsForAdaptationSet(
          dataSource,
          adaptationSets.get(j),
          periodStartUs,
          periodDurationUs,
          allowIncompleteList,
          segments);
    }
  }
  return segments;
}
 

private static boolean hasEventMessageTrack(AdaptationSet adaptationSet) {
  List<Representation> representations = adaptationSet.representations;
  for (int i = 0; i < representations.size(); i++) {
    Representation representation = representations.get(i);
    if (!representation.inbandEventStreams.isEmpty()) {
      return true;
    }
  }
  return false;
}
 

/**
 * Downloads an offline license.
 *
 * @param dataSource The {@link HttpDataSource} to be used for download.
 * @param dashManifest The {@link DashManifest} of the DASH content.
 * @return The downloaded offline license key set id.
 * @throws IOException If an error occurs reading data from the stream.
 * @throws InterruptedException If the thread has been interrupted.
 * @throws DrmSessionException Thrown when there is an error during DRM session.
 */
public byte[] download(HttpDataSource dataSource, DashManifest dashManifest)
    throws IOException, InterruptedException, DrmSessionException {
  // Get DrmInitData
  // Prefer drmInitData obtained from the manifest over drmInitData obtained from the stream,
  // as per DASH IF Interoperability Recommendations V3.0, 7.5.3.
  if (dashManifest.getPeriodCount() < 1) {
    return null;
  }
  Period period = dashManifest.getPeriod(0);
  int adaptationSetIndex = period.getAdaptationSetIndex(C.TRACK_TYPE_VIDEO);
  if (adaptationSetIndex == C.INDEX_UNSET) {
    adaptationSetIndex = period.getAdaptationSetIndex(C.TRACK_TYPE_AUDIO);
    if (adaptationSetIndex == C.INDEX_UNSET) {
      return null;
    }
  }
  AdaptationSet adaptationSet = period.adaptationSets.get(adaptationSetIndex);
  if (adaptationSet.representations.isEmpty()) {
    return null;
  }
  Representation representation = adaptationSet.representations.get(0);
  DrmInitData drmInitData = representation.format.drmInitData;
  if (drmInitData == null) {
    Format sampleFormat = DashUtil.loadSampleFormat(dataSource, representation);
    if (sampleFormat != null) {
      drmInitData = sampleFormat.drmInitData;
    }
    if (drmInitData == null) {
      return null;
    }
  }
  blockingKeyRequest(DefaultDrmSessionManager.MODE_DOWNLOAD, null, drmInitData);
  return drmSessionManager.getOfflineLicenseKeySetId();
}
 

private static int getEmbeddedTrackCount(List<AdaptationSet> adaptationSets) {
  int embeddedTrackCount = 0;
  for (int i = 0; i < adaptationSets.size(); i++) {
    AdaptationSet adaptationSet = adaptationSets.get(i);
    if (hasEventMessageTrack(adaptationSet)) {
      embeddedTrackCount++;
    }
    if (hasCea608Track(adaptationSet)) {
      embeddedTrackCount++;
    }
  }
  return embeddedTrackCount;
}
 

private static boolean hasEventMessageTrack(List<AdaptationSet> adaptationSets,
    int[] adaptationSetIndices) {
  for (int i : adaptationSetIndices) {
    List<Representation> representations = adaptationSets.get(i).representations;
    for (int j = 0; j < representations.size(); j++) {
      Representation representation = representations.get(j);
      if (!representation.inbandEventStreams.isEmpty()) {
        return true;
      }
    }
  }
  return false;
}
 

private static boolean hasCea608Track(AdaptationSet adaptationSet) {
  List<SchemeValuePair> descriptors = adaptationSet.accessibilityDescriptors;
  for (int i = 0; i < descriptors.size(); i++) {
    SchemeValuePair descriptor = descriptors.get(i);
    if ("urn:scte:dash:cc:cea-608:2015".equals(descriptor.schemeIdUri)) {
      return true;
    }
  }
  return false;
}
 

private ArrayList<Representation> getRepresentations() {
  List<AdaptationSet> manifestAdaptationSets = manifest.getPeriod(periodIndex).adaptationSets;
  ArrayList<Representation> representations = new ArrayList<>();
  for (int adaptationSetIndex : adaptationSetIndices) {
    representations.addAll(manifestAdaptationSets.get(adaptationSetIndex).representations);
  }
  return representations;
}
 

private static Pair<TrackGroupArray, TrackGroupInfo[]> buildTrackGroups(
    List<AdaptationSet> adaptationSets, List<EventStream> eventStreams) {
  int[][] groupedAdaptationSetIndices = getGroupedAdaptationSetIndices(adaptationSets);

  int primaryGroupCount = groupedAdaptationSetIndices.length;
  boolean[] primaryGroupHasEventMessageTrackFlags = new boolean[primaryGroupCount];
  Format[][] primaryGroupCea608TrackFormats = new Format[primaryGroupCount][];
  int totalEmbeddedTrackGroupCount =
      identifyEmbeddedTracks(
          primaryGroupCount,
          adaptationSets,
          groupedAdaptationSetIndices,
          primaryGroupHasEventMessageTrackFlags,
          primaryGroupCea608TrackFormats);

  int totalGroupCount = primaryGroupCount + totalEmbeddedTrackGroupCount + eventStreams.size();
  TrackGroup[] trackGroups = new TrackGroup[totalGroupCount];
  TrackGroupInfo[] trackGroupInfos = new TrackGroupInfo[totalGroupCount];

  int trackGroupCount =
      buildPrimaryAndEmbeddedTrackGroupInfos(
          adaptationSets,
          groupedAdaptationSetIndices,
          primaryGroupCount,
          primaryGroupHasEventMessageTrackFlags,
          primaryGroupCea608TrackFormats,
          trackGroups,
          trackGroupInfos);

  buildManifestEventTrackGroupInfos(eventStreams, trackGroups, trackGroupInfos, trackGroupCount);

  return Pair.create(new TrackGroupArray(trackGroups), trackGroupInfos);
}
 

private static boolean hasEventMessageTrack(List<AdaptationSet> adaptationSets,
    int[] adaptationSetIndices) {
  for (int i : adaptationSetIndices) {
    List<Representation> representations = adaptationSets.get(i).representations;
    for (int j = 0; j < representations.size(); j++) {
      Representation representation = representations.get(j);
      if (!representation.inbandEventStreams.isEmpty()) {
        return true;
      }
    }
  }
  return false;
}
 

private static Format[] getCea608TrackFormats(
    List<AdaptationSet> adaptationSets, int[] adaptationSetIndices) {
  for (int i : adaptationSetIndices) {
    AdaptationSet adaptationSet = adaptationSets.get(i);
    List<Descriptor> descriptors = adaptationSets.get(i).accessibilityDescriptors;
    for (int j = 0; j < descriptors.size(); j++) {
      Descriptor descriptor = descriptors.get(j);
      if ("urn:scte:dash:cc:cea-608:2015".equals(descriptor.schemeIdUri)) {
        String value = descriptor.value;
        if (value == null) {
          // There are embedded CEA-608 tracks, but service information is not declared.
          return new Format[] {buildCea608TrackFormat(adaptationSet.id)};
        }
        String[] services = Util.split(value, ";");
        Format[] formats = new Format[services.length];
        for (int k = 0; k < services.length; k++) {
          Matcher matcher = CEA608_SERVICE_DESCRIPTOR_REGEX.matcher(services[k]);
          if (!matcher.matches()) {
            // If we can't parse service information for all services, assume a single track.
            return new Format[] {buildCea608TrackFormat(adaptationSet.id)};
          }
          formats[k] =
              buildCea608TrackFormat(
                  adaptationSet.id,
                  /* language= */ matcher.group(2),
                  /* accessibilityChannel= */ Integer.parseInt(matcher.group(1)));
        }
        return formats;
      }
    }
  }
  return new Format[0];
}
 

private ArrayList<Representation> getRepresentations() {
  List<AdaptationSet> manifestAdaptationSets = manifest.getPeriod(periodIndex).adaptationSets;
  ArrayList<Representation> representations = new ArrayList<>();
  for (int adaptationSetIndex : adaptationSetIndices) {
    representations.addAll(manifestAdaptationSets.get(adaptationSetIndex).representations);
  }
  return representations;
}
 

private static Pair<TrackGroupArray, TrackGroupInfo[]> buildTrackGroups(
    List<AdaptationSet> adaptationSets, List<EventStream> eventStreams) {
  int[][] groupedAdaptationSetIndices = getGroupedAdaptationSetIndices(adaptationSets);

  int primaryGroupCount = groupedAdaptationSetIndices.length;
  boolean[] primaryGroupHasEventMessageTrackFlags = new boolean[primaryGroupCount];
  Format[][] primaryGroupCea608TrackFormats = new Format[primaryGroupCount][];
  int totalEmbeddedTrackGroupCount =
      identifyEmbeddedTracks(
          primaryGroupCount,
          adaptationSets,
          groupedAdaptationSetIndices,
          primaryGroupHasEventMessageTrackFlags,
          primaryGroupCea608TrackFormats);

  int totalGroupCount = primaryGroupCount + totalEmbeddedTrackGroupCount + eventStreams.size();
  TrackGroup[] trackGroups = new TrackGroup[totalGroupCount];
  TrackGroupInfo[] trackGroupInfos = new TrackGroupInfo[totalGroupCount];

  int trackGroupCount =
      buildPrimaryAndEmbeddedTrackGroupInfos(
          adaptationSets,
          groupedAdaptationSetIndices,
          primaryGroupCount,
          primaryGroupHasEventMessageTrackFlags,
          primaryGroupCea608TrackFormats,
          trackGroups,
          trackGroupInfos);

  buildManifestEventTrackGroupInfos(eventStreams, trackGroups, trackGroupInfos, trackGroupCount);

  return Pair.create(new TrackGroupArray(trackGroups), trackGroupInfos);
}
 

private static boolean hasEventMessageTrack(List<AdaptationSet> adaptationSets,
    int[] adaptationSetIndices) {
  for (int i : adaptationSetIndices) {
    List<Representation> representations = adaptationSets.get(i).representations;
    for (int j = 0; j < representations.size(); j++) {
      Representation representation = representations.get(j);
      if (!representation.inbandEventStreams.isEmpty()) {
        return true;
      }
    }
  }
  return false;
}
 

private static Format[] getCea608TrackFormats(
    List<AdaptationSet> adaptationSets, int[] adaptationSetIndices) {
  for (int i : adaptationSetIndices) {
    AdaptationSet adaptationSet = adaptationSets.get(i);
    List<Descriptor> descriptors = adaptationSets.get(i).accessibilityDescriptors;
    for (int j = 0; j < descriptors.size(); j++) {
      Descriptor descriptor = descriptors.get(j);
      if ("urn:scte:dash:cc:cea-608:2015".equals(descriptor.schemeIdUri)) {
        String value = descriptor.value;
        if (value == null) {
          // There are embedded CEA-608 tracks, but service information is not declared.
          return new Format[] {buildCea608TrackFormat(adaptationSet.id)};
        }
        String[] services = Util.split(value, ";");
        Format[] formats = new Format[services.length];
        for (int k = 0; k < services.length; k++) {
          Matcher matcher = CEA608_SERVICE_DESCRIPTOR_REGEX.matcher(services[k]);
          if (!matcher.matches()) {
            // If we can't parse service information for all services, assume a single track.
            return new Format[] {buildCea608TrackFormat(adaptationSet.id)};
          }
          formats[k] =
              buildCea608TrackFormat(
                  adaptationSet.id,
                  /* language= */ matcher.group(2),
                  /* accessibilityChannel= */ Integer.parseInt(matcher.group(1)));
        }
        return formats;
      }
    }
  }
  return new Format[0];
}
 

private ArrayList<Representation> getRepresentations() {
  List<AdaptationSet> manifestAdaptationSets = manifest.getPeriod(periodIndex).adaptationSets;
  ArrayList<Representation> representations = new ArrayList<>();
  for (int adaptationSetIndex : adaptationSetIndices) {
    representations.addAll(manifestAdaptationSets.get(adaptationSetIndex).representations);
  }
  return representations;
}